Slide-valve gear for four-stroke cycle explosion-engines.



H. HCKEL. l

SLIDE VALVE GEAR FOR FOUR-STROKE CYCLE EXPLOSION ENGINES. APPLIoATioN FILED JUNE 29, 1912.

1,088,580. Petentea Feb.24,1914

HUGO H'UCK'EL, 0F 'NE'TITSCHEIN, AUSTRIA-HUNGARY.

SLIDE-VALVE GEAR. FOR FGURf-STRK CYCLE EXPLOSION-EN GINES.

pe'cica'ti'on of Letters Patent.

Patented Feb. 24, 1914.

Application filed June29, 1912. -lSerial o. 706,789.

To all 'whom it may concern:

Be it known that I, HUGO HcKEL, a subject of the Austro-Hungarian Em eror, and resident of Neutitschein, Austriaungary,

have invented certain new and usefull lmprovements in Slide-Valve Gears for Four- Stroke CyclelExplosion-Engines, of which the following isa specification.

This invention relates tovalve gears for engines.

The object of the invention is to provide a slide valve in one end of the cylinder, in such manner that said valve forms a cylinder head, and may be operated to admit a charge, or exhaust the spent gases.

A further object of the invention is to provide mechanism which will vary the area 'of the cylinder during the charging and exhausting periods, whereby to obtain the most eifectlv'e'results. The invention also relates to the specific details of construction and arrangement of parts which will be hereinafter described and particularly pointed out in the claims. In the accompanying drawings Figure 1 is -a vertical section on line 1 1 of Fig. 2. Fig. 2' is a section on the line 2 2 of Fig. 1. Fig. 3 is a section on the line 3 3, of Fig. l. A'indicates a cylinder housed at its upper end by al casing A', which forms a chamber A2. Below the casing A', the cylinder is provided with an annular exhaust chamber K, having an exit K to the atmosphere. Communicating with the exhaust chamber and the cylinderA, are outlet openings a", through which the spent gases are ejected when the engine is operating.l Operating on the upper end of the cylinder A, and forming the head thereof is a cylindricall slide valve d, formed with a horizontal partition r, having therein an inlet port r', and in the side walls, below the plane of the partition are outlet ports O. The outlet ports coperate with the outlet ports a", during the operation of the `engine, as will be explained later cn.

Mounted in suitable bearings in the casing A', is a horizontal shaft a, to which is secured an eccentric The eccentric is hollow, and is open at its ends to provide ports m', and m2, which communicate with the chamber A2. In the periphery of the eccentric is an inlet port m3, which communicates with the hollow portion, as clearly shown in the drawings. Surrounding the periphery of the eccentric is 'a band or casing C, the lower portion or base of which is provided with lateral ianges c", said flanges operating on the upper surface of the horizontal partition r. The iianges operate in guides on the partition formed by flanges tf and t2. In the bottom of the casing c, is an inlet port S, which registers with the inlet port 7", and is adapted to register with the inlet port m3, in the eccentric, when the latter is rotated.

In operation, the parts are so timed that when the werking piston W descends to draw in a charge, the eccentric will operate to move the slide valve (l, in the opposite direction and close the outlet ports ax, and at the same time the inlet port m3, will register with the inlet port S, and a charge will be drawn into the cylinder from the chamber A2. The next return stroke of the piston will compress the charge, andthe latter will be fired, then upon the next up-st-roke of the piston, the eccentric will move the slide valve d, so as to bring the outlet ports o and a* into registry and the spent gases will be forced out into the exhaust chamber K.

By the construction described, the arca of the cylinder at the time the gas is fired, is greater than during the exhaust period, which produces a more eii'ective blow on the piston in one instance, and the gases are more Aefliectually exhausted in another instance.

The eccentric is timed so that the valve and the inlet ports will coperate with the piston to produce the desired result.

What I claim is 1. ln a valve gear for four stroke cycle explosion engines, the combination of a cylinder provided Vwith an exhaust port in its side walls, a slide valve operating in the cylinder and forming the head of the latter and controlling the exhaust port, theslide valve having an inlet port, guides on the outside of the slide valve,` a casing having a base formed with a passage and operating'in the guides, the passage registering with the inlet port in the slide valve, an eccentric mounted to rotate in the casing and formed with an inlet port which, in the rotation of the eccentric, registers with the inlet ports in the casing and the slide valve, means for introducing fuel to the port in the eccentric, and means for operating the eccentric to cause the inlet ports to register exhaust ports, a slide valve having exhaust' ports adapted to register with the exhaust ports in the cylinder and forming the head of the latter, said slide valve having an inlet port, an eocentrically mounted rotary valve having an inlet port and mounted on the slide valve to operate the latter to close the exhaust ports in' the. cylinder and simultaneously open the inlet port in the slide valve to admit a charge to the cylinder, said eccentrically mounted rotary valve also act,- L

.set my hand 1n presence of two Witnesses.

' HUGO HC-KEL.

ing to close the inlet port and reverse the movement of the slide valve to open the exhaust ports in the cylinder.

3. In a valve' gear for explosion engines, the combination of a cylinder formed with an exhaust port, a sliding valve operating sage adapted toregister with theinletports in the rotation of said element, means for simultaneously rotating the element and operating the valve to close the exhaust port and admit a charge to the cylinder, said means Ialso 'acting to open the exhaust port and close the inlet port, and means foi" admitting a charge to the rotating element.

In testimony whereof I have hereunto Witnesses y AUGUsT JOUAK, ERNST RABEL. 

